20122001210121 has 16 divisors (see below), whose sum is σ = 26934815476800. Its totient is φ = 13361931419648.

The previous prime is 20122001210057. The next prime is 20122001210137. The reversal of 20122001210121 is 12101210022102.

It is a cyclic number.

It is not a de Polignac number, because 20122001210121 - 2⁶ = 20122001210057 is a prime.

It is a super-2 number, since 2×20122001210121² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122001210121.

It is not an unprimeable number, because it can be changed into a prime (20122001214121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19076770 + ... + 20103908.

It is an arithmetic number, because the mean of its divisors is an integer number (1683425967300).

Almost surely, 2^{20122001210121} is an apocalyptic number.

It is an amenable number.

20122001210121 is a deficient number, since it is larger than the sum of its proper divisors (6812814266679).

20122001210121 is a wasteful number, since it uses less digits than its factorization.

20122001210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052808.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20122001210121 its reverse (12101210022102), we get a palindrome (32223211232223).

The spelling of 20122001210121 in words is "twenty trillion, one hundred twenty-two billion, one million, two hundred ten thousand, one hundred twenty-one".